The Large Option for Sending Video Images Is Unavailable (192866)


The information in this article applies to:

  • Microsoft NetMeeting 2.1 for Windows 98
  • Microsoft NetMeeting 2.1 for Windows 95
This article was previously published under Q192866

SYMPTOMS

When you are running NetMeeting and you click Options on the Tools menu and then click the Video tab, the Large option in the Send Image Size area may be unavailable. This can occur even if the video capture adapter is capable of sending large video images.

CAUSE

This behavior can occur when the video capture adapter is not registered with NetMeeting.

MORE INFORMATION

When your computer is configured to use a video capture adapter that is not registered with NetMeeting, NetMeeting queries the video capture adapter for its default capture frame size. The default capture frame size is usually 160 X 120 or 320 X 240. NetMeeting uses this default capture frame size to generate all the NetMeeting frame sizes. These frame sizes are: 
   Small  - 128 X 96
   Medium - 176 X 144
   Large  - 352 X 288
If the default capture frame size is 160 X 120 (or close to it), NetMeeting enables the Small and Medium options because NetMeeting can create the small size by cropping from 160 X 120 to 128 X 96, and create the medium size by black banding the 160 X 120 images to 176 X 144. The large size is disabled.

If the default capture frame size is 320 X 240 (or close to it), NetMeeting enables all the image size options because NetMeeting can create a 160 X 120 image by down-sampling a 320 X 240 image. NetMeeting then uses the same techniques it uses with the 160 X 120 default frame size to generate the remaining NetMeeting frame sizes. Overall NetMeeting video performance can be slow because of the overhead of capturing video in 320 X 240 mode.
Modification Type:MajorLast Reviewed:10/20/2003
Keywords:kbenv kbHardware kbprb KB192866
©2003 Microsoft Corporation. All rights reserved.